go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0: Exporter.Shutdown

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify stdouttrace.Exporter.Shutdown in pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0
Demonstrate these symbols/APIs:
  - stdouttrace.Exporter.Shutdown

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:87c5b46c994b99ea38b1624d614b08baff607bd8dd08f23954b61715646cbff2","contract":["stdouttrace.New creates an Exporter that can be shut down","stdouttrace.Exporter.Shutdown flushes and shuts down the default exporter","stdouttrace.Exporter.Shutdown is idempotent and can be called consecutively","stdouttrace.Exporter configured with options shuts down cleanly","stdouttrace.Exporter.Shutdown with canceled context returns without hanging"],"goal":"verify stdouttrace.Exporter.Shutdown in pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0"],"schemaVersion":1,"symbols":["stdouttrace.Exporter.Shutdown"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","languageVersion":"1.26.6","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0","symbols":["stdouttrace.Exporter.Shutdown"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require (
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/go-logr/logr v1.4.3 // indirect
	github.com/go-logr/stdr v1.2.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
	go.opentelemetry.io/otel v1.43.0 // indirect
	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0
	go.opentelemetry.io/otel/metric v1.43.0 // indirect
	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
	go.opentelemetry.io/otel/trace v1.43.0 // indirect
	golang.org/x/sys v0.42.0 // indirect
)

github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
go.opentelemetry.io/otel v1.43.0 h1:mYIM03dnh5zfN7HautFE4ieIig9amkNANT+xcVxAj9I=
go.opentelemetry.io/otel v1.43.0/go.mod h1:JuG+u74mvjvcm8vj8pI5XiHy1zDeoCS2LB1spIq7Ay0=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0 h1:mS47AX77OtFfKG4vtp+84kuGSFZHTyxtXIN269vChY0=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0/go.mod h1:PJnsC41lAGncJlPUniSwM81gc80GkgWJWr3cu2nKEtU=
go.opentelemetry.io/otel/metric v1.43.0 h1:d7638QeInOnuwOONPp4JAOGfbCEpYb+K6DVWvdxGzgM=
go.opentelemetry.io/otel/metric v1.43.0/go.mod h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY=
go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg=
go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg=
go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A=
go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=

package main

import (
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
)

func main() {
	exp, err := stdouttrace.New(stdouttrace.WithPrettyPrint())
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to create exporter: %v\n", err)
		os.Exit(1)
	}

	ctx := context.Background()
	if err := exp.Shutdown(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "failed to shutdown exporter: %v\n", err)
		os.Exit(1)
	}

	fmt.Println("stdouttrace exporter initialized and shutdown successfully.")
}

{
  "schemaVersion": 1,
  "goal": "verify stdouttrace.Exporter.Shutdown in pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/exporters/stdout/stdouttrace@v1.43.0"
  ],
  "symbols": [
    "stdouttrace.Exporter.Shutdown"
  ]
}

package main

import (
	"bytes"
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
)

func main() {
	ctx := context.Background()

	// 1. stdouttrace.New creates an Exporter that can be shut down
	expDefault, err := stdouttrace.New()
	if err != nil {
		fmt.Fprintf(os.Stderr, "Contract failure: failed to create default exporter: %v\n", err)
		os.Exit(1)
	}

	// 2. stdouttrace.Exporter.Shutdown flushes and shuts down the default exporter
	if err := expDefault.Shutdown(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "Contract failure: default exporter shutdown failed: %v\n", err)
		os.Exit(1)
	}

	// 3. stdouttrace.Exporter.Shutdown is idempotent and can be called consecutively
	if err := expDefault.Shutdown(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "Contract failure: consecutive shutdown failed: %v\n", err)
		os.Exit(1)
	}

	// 4. stdouttrace.Exporter configured with options shuts down cleanly
	var buf bytes.Buffer
	expConfigured, err := stdouttrace.New(
		stdouttrace.WithWriter(&buf),
		stdouttrace.WithPrettyPrint(),
		stdouttrace.WithoutTimestamps(),
	)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Contract failure: failed to create configured exporter: %v\n", err)
		os.Exit(1)
	}

	if err := expConfigured.Shutdown(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "Contract failure: configured exporter shutdown failed: %v\n", err)
		os.Exit(1)
	}

	// 5. stdouttrace.Exporter.Shutdown with canceled context returns without hanging
	canceledCtx, cancel := context.WithCancel(ctx)
	cancel()
	if err := expConfigured.Shutdown(canceledCtx); err != nil && err != context.Canceled {
		fmt.Fprintf(os.Stderr, "Contract failure: unexpected shutdown error on canceled context: %v\n", err)
		os.Exit(1)
	}

	fmt.Println("All stdouttrace.Exporter.Shutdown contract assertions passed successfully.")
}